Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Seh Min Oh"'
Publikováno v:
Journal of Power Sources. 190:553-557
To investigate the effect of non-graphitic carbon coatings on the thermal stability of spherical natural graphite at elevated temperature, differential scanning calorimetry (DSC) and X-ray diffraction (XRD) measurements are performed. Data from DSC s
Publikováno v:
Bulletin of the Korean Chemical Society. 29:1121-1124
A carbon composite was synthesized by mechanical mixing of ball-milled graphite and PVC powders, followed by pyrolysis reaction of PVC. Natural graphite ball milled under atmosphere of argon or air leads to a disordered structure. It appears that the
Publikováno v:
Journal of Power Sources. 166:250-254
Surface modification by a soft-carbon coating is used to improve the electrochemical performance of hard carbons as the negative-electrode (anode) material in lithium-ion batteries. The coating process involves simple heat-treatment of a mixture of c
Publikováno v:
Journal of Materials Science. 27:5199-5202
Mesophase pitches prepared by a heterogeneous nucleation method from various mixtures of coal tar-derived isotropic pitch and petroleum-derived mesophase pitch (MP-P) were oxidatively stabilized, and the dependence of chemical reactivity and stabiliz
Publikováno v:
ECS Meeting Abstracts. :423-423
Much work has described the influence of anodic SEI (Solid Electrolyte Interphase) on the cycle stability of a lithium secondary battery. Especially, it was reported that the characteristics of SEI Layer were greatly affected by the crystallographic
Autor:
Seh-Min Oh, Yang-Duk Park
Publikováno v:
MRS Proceedings. 349
An analytical method was developed to calculate efficiency of densifying carbon/carbon (C/C) composite with pitch for each cycle. Three factors were defined in the densificationprocess: an impregnation efficiency, w, a retention efficiency, x, and an
Autor:
Jai-Young Lee, Seh-Min Oh
Publikováno v:
Carbon. 24:411-415
The formation of soot particles during the deposition of pyrolytic carbon in a tumbling bed and its effects on the mechanical properties of the pyrolytic carbon deposited have been investigated under various deposition conditions. The soot particles
Publikováno v:
Carbon. 23:487-492
The relation between the coating conditions and mechanical properties of the isotropic pyrolytic carbons deposited in a tumbling bed have been investigated. At a constant total flow rate of mixed gases and a constant revolution rate of the reaction t
Autor:
Jai-Young Lee, Seh-Min Oh
Publikováno v:
Carbon. 26:769-776
Mechanical properties of carbon/carbon composites prepared by thermal-gradient CVD technique were investigated by three-point flexural tests. The mechanical properties are strongly influenced by the matrix structure, which in turn depends on the depo
Autor:
Seh-Min Oh, Jai-Young Lee
Publikováno v:
Carbon. 26:763-768
Carbon/carbon composites made from carbon mats and propane-derived pyrolytic carbon matrices have been characterized by optical microscopy and structural parameters such as density and apparent crystallite size. It is shown that the pyrolytic carbon